Improved composition foe roofing



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Letters Patent No. 75,634, dated March 17, 1868.

V IMPROVED COMPOSITION FOR ROOFIN G.

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TO ALL WHOM IT MAY CONCERN:

Be it known that L JOHN H. HOOD, of .Danville, in the county ofLivingston, and State of New York.

have invented certain new and useful Improvements in Roofing and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification. I My improvement consists in the construction ofroofs in the manner hereinafter described. I In the first place,'I coverthe roof with stout paper, which is secured to theboards by strips ofoil or fe1tcloth being tacked upon it over the edges. I then take tengallons of coal-tar and stir in two (2) bushels of plaster and one (1)-bushel of saw-dost, for the purpose'of giving body to the otheringredients.

When the above materials are thorpiighly-incorporated, spread them overthe paper with a brush. I then take fine crystal rock,'and with a finesieve sift it over the roof, torthe thickuess ot" about one-eightlrof aninch Iv Let the compound dry for the term of three weeks. I then mix asuitable quantity of fine crystal rock with coal-tar, say about as oneof crystal roclr to four of tar, and spread it over the-entire roof,which, when dry, will make a very dnrable and economical roof, as seenfrom accompanying specimen.

I am aware that coal-tar, as also the crystal rock and plaster, havebeen combined for roofing pnrposs,

and therefore lay no claim to them; but

What I do claim; is-

A roof prepared asspecified, and covered with the compound made in. themanner described.

In testimonythat I claim the foregoing as my own, I aflix my signaturein presence of two witnesses. JOHN H. HOOD,

Witnesses:-

D.'W. NoYEs, M. O. ROBINSON.

